Measurement of a small atmospheric νμ/νe ratio

被引：638

作者：

Fukuda, Y ^{[1
]}

Hayakawa, T

Ichihara, E

Inoue, K

Ishihara, K

Ishino, H

Itow, Y

Kajita, T

Kameda, J

Kasuga, S

Kobayashi, K

Kobayashi, Y

Koshio, Y

Martens, K

Miura, M

Nakahata, M

Nakayama, S

Okada, A

Oketa, M

Okumura, K

Ota, M

Sakurai, N

Shiozawa, M

Suzuki, Y

Takeuchi, Y

Totsuka, Y

Yamada, S

Earl, M

Habig, A

Hong, JT

Kearns, E

Kim, SB

Masuzawa, M

Messier, MD

Scholberg, K

Stone, JL

Sulak, LR

Walter, CW

Goldhaber, M

Barszczak, T

Gajewski, W

Halverson, PG

Hsu, J

Kropp, WR

Price, LR

Reines, F

Sobel, HW

Vagins, MR

Ganezer, KS

Keig, WE

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, Tanashi, Tokyo 1888502, Japan

[2] Boston Univ, Dept Phys, Boston, MA 02215 USA

[3] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[5] Calif State Univ Dominguez Hills, Dept Phys, Carson, CA 90747 USA

[6] George Mason Univ, Dept Phys, Fairfax, VA 22030 USA

[7] Gifu Univ, Dept Phys, Gifu 5011193, Japan

来源：

PHYSICS LETTERS B | 1998年 / 433卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(98)00476-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

From an exposure of 25.5 kiloton-years of the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum p(e) > 100 MeV/c, p(mu) > 200 MeV/c, and with visible energy less than 1.33 GeV. Using a detailed Monte Carlo simulation, the ratio (mu/e)(DATA)/(mu/e)(MC) was measured to be 0.61 +/- 0.03(stat.) +/- 0.05(sys.), consistent with previous results from the Kamiokande, IMB and Soudan-2 experiments, and smaller than expected from theoretical models of atmospheric neutrino production. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：9 / 18

页数：10

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